Wow, looks amazing! my husband and I are thinking of doing something similar. Is the tank standard or custom? is that a standard wall or did you build into it for support? we are just in the idea and research phase of the plan so I have more questions than answers.

The wall was originally the outside front so it's sat on the main foundations and 12" thick so there wasn't any issues with weight... I designed the tank to fit to one side to get it central with the wall and to leave room for the filter etc down one side. i had to stud the bottom with 3x2 to raise the tank to a higher level, and then lined it with 12mm Corian so the heat and moisture won't effect any of the wood, the tank was then made to fit. £240 delivered